::SelectObject( memdc, hbitmap );
::BitBlt( cdc, x, y, bmp.GetWidth(), bmp.GetHeight(), memdc, 0, 0, SRCCOPY);
::DeleteDC( memdc );
::SelectObject( memdc, hbitmap );
::BitBlt( cdc, x, y, bmp.GetWidth(), bmp.GetHeight(), memdc, 0, 0, SRCCOPY);
::DeleteDC( memdc );